www.toboc.com
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Achromatic lens
Speicfications are as following:
* Material:A flint and crown glass, such as BK7 glass & ZF2 (or ZF4)
* EFL:+/-1%
* Dia:+0, -0.05
* Center thickness tolerance:+/-0.05
* Surface quality:60-40 stratch/dig
* Surface precision:Wave length/2 at ...
Sku: JOOP05
Price: 10.00 USD
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